Shock absorber



Sept. 3.; 1940- c. FAURE-Roux SHOCK- ABsoRER Filed April 21 -fovx N v E N To@ mmv-L charla s Fo ve Patented Sept.'3, 1940 Y I I UNITED STATES PATENT OFFICE t SHOCK ABSORBER Charles Faure-Roux, Saint-Chamond, France, assignor 'to Etablissements Ch. Faure-Roux, Saint- Chamond, Loire, France Application April 21, 1937, Serial No. 138,096

In France April 27, 1936 1 claim. (c1. 2cv-ssi' The present invention relates to a shock abof a Isingle part or of several parts side by side. sorber of the type comprising, in combination, The said extensible device I3 is secured by its an oil brake and a rubber extensible device, the ends, respectively to the end of the tube I2 and said shock absorber being chiefly characterized to the end of the piston tube 2 by means of con- 5 by the fact that the extensible device (single or necting axles I4 and I5. The axle I5 traverses 5 with several parts) is mounted -in the interior the tube I2 through longitudinal slots I6 formed of the oil brake and is coaxial with the latter. in the said tube.

This arrangement permits of obtaining greater The operation iS aS fOllOWS. By the aC'On lengths of movement for a given length of'the 0f the fOrceS P and P' Which are equal and in whole apparatus in the idle position, than in the contrary directions, exerted upon the shock ab- 10 case of a series mounting of a' brake and a oosorber (one of these forces may consist of a simaxial extensible device. In fact, for the same ple resistance), the tubular DSIDOII 2 mOVeS int'l0 total length, the length of the extensible device the cylinder I and produces a braking effect by in the idle position can be greater, and thus the aotingupon the oil in the annuler space 1, this l5 length of movement is greater; this length ofl Oil being driven from the chamber 8 to the cham- 15 movement is evidently a direct function of the ber 9. length of the extensible device when in the idle At the saine time, the extensible device I3.

position. which is secured to the tube I2 by the axle I4 In the accompanying drawing, which is given and to the tubular piston rod 2 by the axle I5,-` solely by way of example: is obliged to lengthen, and the axle I5 slides in 2o Fig. 1 is a. diagrammatic longitudinal section the slots I6. The extensible device counterba1- of ashock absorber in conformity with the invenences the forces P+P. and it then returns the tion, which is adapted to operate by compression. piston 2-6 to its initial position when the forces Fig. 2 is a cross-section of the same on the P and P Cease t0 Operate. 1ine22 of Fig. 1, on alarger soo1e, The braking eiect which is obtained during 25 Fig. 3 is a diagrammatic longitudinal section the return mOVement by acting llpOn the Oil in of a modification, which is adapted to operate by the 2111111131 Space 7, Which Oil is obliged to Pass extension, from the chamber 9 to the chamber 8, will ab- In the embodiment represented in Figs. 1 and 2, Sorb, in conjunction with the suspended mass or 3o the main body of the shock absorber, Whose masses, the WhOle Of the energy restored by the 30 longitudinal axis is X Xy consists of two coaxial extensible device, and thus the said masses will tubes I and 2. 'I'he tube I has a. closed end 3 0i reboundprovided with a, device 4 for attaching the ap, It should be noted that the two parts or groups paratus to one of the two parts or groups of parts 0f Darts Which are connected together by the which are to be connected together by the shock 51109K absorber, may be mOVable, OI' Only 011e 0f 35 absorber and whose relative displacements are to theile may be mOVable. be dampened or braked, and especially when com- Fg- 3 ShOWS a modified fOTm 0f Shock absorber, ing together, which operates by traction. The extensible de- 'Ihe outer tube 2 is connected. at 5 with the vice is connected by an axle I4 to the tube I2 40 other part or group of parts, and for instance by and' by an axle I5 to the tube 2 which forms a 40 a simple surface of contact. piston rod. Tbe tube 2 Carries a Shollldel 5 forming a DS- Under the effect of the forces -of traction T -ton m the cylinder leavmg a' narrow annular and T', one of which forces may be reduced to a Passage .7 thfs provldmg tw? -chambers 8 an@ 9 resistance (if the attaching part 4 or II is sta- Whose Slze Wm Vary accordmg to the relatlve tionary), the piston 2 will partially move out of 45 longitudinal positions of' the tubes I and 2. The chambers 8 and 9 are closed at the other ends by rflfmlac'rllldgol tgl; Idlcllglea al'lg automatic packing members I0 and II, which .l ensure non-leaking conditions for the cylinder. Space The two chambers s and 9 are filled with on 'I'he extensible device I3 1s leigthened under 50 or other liquid the action of the forces T ,and T', which it coun- In the interior of the tubular body L and in terbalances, and it then brings the piston to its the coaxial position, is rigidly secured to the initial DOSOD When the traction CeaSeS. closed end 3, a tube I2. In the said tube I2 is 'Ihe energy restored by the extensible device mounted an extensible rubber device I3 consisting `during its return movement is absorbed simul- 55 taneously and entirely by the oil brake and by the suspended mass or masses.

This arrangement permits of reducing the total length of the apparatus when in the idle position, to a length which hardly exceeds that of the extensible device, i. e., to the stroke of the shock absorber in the case in which the maximum elongation of the said extensible device is 100%.

Obviously, the said invention is not limited to the embodiments herein described and represented, which are given solelyvby way of example.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

A. shock absorber between two parts movable with relation to each other comprising in come bination a cylinder adapted to be connected with one of said parts, a piston adapted to be reciprocated insaid cylinder and dividing said cylinder into two compartments while providing a passage of reduced section between said compartments, a hollow rod secured on said piston adapted to slide through the two end walls of said cylinder `and to be connected with the other of said parts, a tubular member extending in said hollow rod and on both sides of one end wall of said cylinder and connected with said cylinder, said hollow rod with said tubular member form-r ing an axial chamber without communication with said compartments, at least one longitudinal slot being provided in said tubular member in the portion situated on the outer side of said one end Wall f said cylinder, a fluid in said cylinder adapted to pass from one of said compartments into the other through said passage of reduced section when said piston is displaced in said cylinder, an elastic extensible device extending in said axial chamber at least partially between the endwalls of said cylinder when in the contracted position and connected at one end with said tubular member, and connecting means adapted to slide in said slot and to connect the other end of said extensible device with said hollow rod.

CHARLES FAURE-ROUX. 

